1) Which of these does NOT happen when you cook potatoes? a) The cell walls break down b) It becomes easier to digest c) Reversible changes occur d) New substances are produced 2) What is an artificial substance? a) One that is manufactured by people b) One that exists in nature c) A chemical compound d) One that is different from its natural equivalent 3) Which statement is NOT true about artificial sweeteners? a) They have no calories b) They are chemically different to sugars c) They taste extremely sweet d) They are carbohydrates 4) What is the pH of vinegar? a) 2 b) 5 c) 7 d) 8 5) Which of these is a use of phosphoric acid? a) Production of petrol and nylon b) Processing steel c) Found in vinegar d) As a food additive to give a tangy taste 6) Which type of reaction occurs between acids and bases? a) Oxidation b) Thermal decomposition c) Displacement d) Neutralisation 7) What two compounds are made in a neutralisation reaction? a) Salt + Water b) Salt + Oxygen c) Metal oxide + Hydrogen d) Salt + Hydrogen 8) What is compound X? a) sulphuric acid b) hydrochloric acid c) nitric acid d) phosphoric acid 9) What is compound Y? a) Carbon dioxide b) Hydrogen c) Water d) Sulphuric acid 10) What gas is produced when a metal carbonate reacts with acid? a) Carbon dioxide b) Oxygen c) Nitrogen d) Hydrogen 11) What is this yellow substance? a) A solution b) An acid c) A gas d) A precipitate 12) How do you make a precipitate? a) Mix an acid and a base b) Mix an acid with a metal carbonate c) Mix two soluble salt solutions d) Mix an acid with a metal oxide 13) What does this symbol mean? a) Toxic b) Highly flammable c) Harmful d) Corrosive 14) What does this symbol mean? a) Oxidising b) Harmful c) Irritant d) Toxic 15) What substance is always produced in a hydration reaction? a) Carbon dioxide b) Water c) Hydrogen d) Salt 16) Which of these metals is NOT found as an ore? a) Iron b) Copper c) Magnesium d) Gold 17) Which metal is extracted in a blast furnace? a) Copper b) Gold c) Magnesium d) Iron 18) This technique is used when the gas collected is heavier than air. What is it? a) Upward delivery b) Downward delivery c) Gas syringe d) Collection over water 19) How do you test for hydrogen? a) Glowing splint b) Damp litmus paper c) Lime water d) Lighted splint 20) Which gas turns damp red litmus paper blue? a) Hydrogen b) Chlorine c) Ammonia d) Carbon dioxide

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